• 소음진동
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• 제9권6호
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• pp.1187-1192
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• 1999

The purpose of this study is to determine the most appropriate experimental method of the measurement of "damping loss factors" (DLF) for the statistical energy analysis(SEA) calculation. The successful prediction of vibration levels from the structure is critically dependent on the accurate estimation of DLF's not only in conventional vibration analysis but especially in SEA. Unforunately, calculation of accurate DLF is not an easy matter. So experimental methods are made use of for the DLF values. Three kinds of experimental methods for estimating DLF, i.e. decay rate method, half-power bandwidth method and power balance method, are presented and tests are carried out for the plate and the cylindrical shell examples. Pro and con of each methods is reviewed. Finally, calculated DLF values are used for vibration level estimation using commercial SEA software and compared with measured vibration data.tion data.

• 한국철도학회논문집
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• 제11권3호
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• pp.248-256
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• 2008

본 논문은 고속철도 주변 통신회선에 발생되는 잡음전압의 실체 파악을 통해 전력유도잡음전압이 발생하지 않는 것을 증명하였으며, 국내통신회사 및 전파연구소에서 사용하고 있는 평형도 측정에서의 문제점과 계측 오류를 규명하며 표준 측정회로와 측정 조건을 ITU-T 국제 기준에 맞도록 개정할 것을 제안한다.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2006년도 하계학술발표대회 논문집
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• pp.838-846
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• 2006

The purpose of this study to develop the air-conditioning system that adopts adaptive model as an indoor climate control logic for energy saving. The adaptive model using the ability of human thermal adaptation could be expected to alleviate the indoor set-point temperature compared with the past heat-balance model. Especially, in case of hybrid air-conditioning system coupled with natural ventilation and heating/cooling system, the adaptive model can be describe the thermal comfort of inhabitant who stay at hybrid system controlled buildings with accuracy. In this paper, the concept of adaptive model will be described and the results of a continuous measurement on the actual thermal experiences and behaviors of thermal adaptation for office worker will be reported.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2008년도 추계학술대회 논문집
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• pp.39-40
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• 2008

• 한국원자력학회:학술대회논문집
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• 한국원자력학회 2004년도 추계학술발표회 발표논문집
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• pp.1447-1448
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• 2004

As the plants are classified as a bulk facility by the Agency's safeguards criteria, the Material Balance Evaluation is a good tool to timely detect diversion that will be accomplished through the creation of defects as small as bias defects. Through all evaluations made by the Agency, it Is strongly recommended to report SRD based on both weight and enrichment, maintain the reliable MUF declaration and improve the gamma spectrometry measurement procedure. These recommendations have been now applied and are going on.

• 대한정형도수물리치료학회지
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• 제23권1호
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• pp.23-30
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• 2017

Purpose: The purpose of this study was to investigate the effect of transverse abdominis ratio and balance ability during bridge exercises on different support surface. Methods: The subjects were 20 students at G University. Ultrasound equipment was used to measure the transverse abdominisratio and the computerized balance measurement equipment was used to measure the balance ability before and after bridge exercises on different support surface. Results: Transverse abdominis ratio change between the groups was a significant difference only in the unstable support surface training group (p<.05). Normal standing eye close balance ability change between the groups was significantly different only in the unstable support surface training group (p<.05). The changes in the transverse abdominis ratio after 7 days of exercise and 14 days after exercise were significantly different between the groups (p<.05). Normal standing eye close balance ability showed a significant difference at 7 days after exercise and 14 days after exercise (p<.05). Conclusions: It is more effective to balance ability and ratio of the transverse abdominis when bridge exercises on an unstable support surface than to perform bridge exercises on a stable support surface. Therefore, we propose an effective program for patients with instability of the lumbar in clinical practice. bridge exercises on different support surface.

• The Journal of Korean Physical Therapy
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• 제27권3호
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• pp.169-173
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• 2015

Purpose: This study aimed to improve the asymmetrical weight-bearing ratio, by applying different repetitive sit-to-stand training methods to the paretic-side foot of hemiplegic patients, as well as to provide the necessary information for applying balance training with hemiplegic patients. Methods: The subjects were divided into two groups: a spontaneous foot group and an asymmetrical foot group. They all performed repetitive sit-to-stand training five times a week for a total of six weeks. The sit-to-standing movement was studied using standardized clinical tests. The Biodex Balance System, Time up and go test (TUG), 5 times sit-to-stand test (5XSST), and functional reach test (FRT) were used to measure the static and dynamic standing balance of the patients. Results: In the balance system measurement, the results for the overall index, ant-post index, med-lat index, fall risk index, 5XSST, and FRT after the training differed significantly between the comparison groups (p<0.05). In the evaluation of dynamic balance, the differences in TUG did not differ significantly between the comparison groups after the training (p>0.05). Conclusion: The study found that the asymmetrical group showed significant increases in static and dynamic balance in comparison to the spontaneous group after repetitive sit-to-stand training. Based on this result, it is clear that training in an asymmetrical position with the paretic foot back can increase the left-right stability limit and the anterior-posterior stability limit, thus improving balance control.

• 대한통합의학회지
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• 제2권2호
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• pp.59-65
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• 2014

Purpose : This study was to investigate the influence of imagery balance for healthy normal people in their twenties. Method : The study has taken a place in Kyung-buk college in Yung-jusi in Kyungbuk with a group of 21 healthy peoples. The study used measurement of good balance. we measured balance for data of each static and dynamic. Training period, a total of 2 weeks. Except Saturday and Sunday, the study did weekdays. Fist, 2-minute relaxation. Second, 6-minute imagine training. Third, 2-minute relaxation. Total 10-minute training was conducted per training. Result : In study, the subjects were compared date for before the study to date for after the study. The subjects showed a little change in each Balance. But, the improvement of balance was not a big change. Conclusion : Image training kinesthetic image using hearing improved incompletely inspite of being no gap, numerically balance.

• The Journal of Korean Physical Therapy
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• 제20권2호
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• pp.1-10
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• 2008

Purpose: This study examines the effects of elastic band of resistance exercise for balance control of the elderly. Methods: Thirty of eighty participants in experiment subjects who demonstrated balance-impairment through the use of primary screening tests including the one leg standing test (OLST), functional reach test (FRT) and timed up and go (TUG) were selected as subjects. Fifteen subjects that underwent muscle-strengthening exercise using an elastic band were selected as the exercise group and fifteen subjects were selected as a control group. Subjects undertook a home-based exercise program three times per week for 9 weeks. Muscle strength, functional assessment and a balance test were quantitatively measured before and after the exercise regimen. Results: After muscle strengthening exercises, changes in maximal voluntary isometric contraction (MVIC) showed a significant increase in all of the lower extremity muscles of the exercise group subjects. There were statistically significant differences between the exercise and control groups for changes in the OLST, FRT and TUG, which are functional assessments of balance ability, and changes of the unit path length and circumference area, measurement items of quantitative analysis. In addition, from examining correlations between MVIC, balance ability, it was found that an increase of muscle strength in the hip joint group of muscles among the lower extremity muscles had greater improvement in correlation with balance ability in this elderly population. Conclusion: Resistance exercise using elastic bands had significant effects on muscle strengthening in elderly subjects, with a resultant increase of lower extremity muscle strength with significant improvement of balance ability.

• 산업융합연구
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• 제20권11호
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• pp.213-219
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• 2022

본 연구는 밸런스트레이닝이 대사증후군 지표 및 기능적 체력에 미치는 영향을 살펴보고자 하였다. 이를 위해 평상시 허리 및 어깨 통증을 호소하는 고령여성 16명을 대상으로 12주간의 밸런스트레이닝을 실시하였다. 또한 16명의 대상자 중 8명은 운동군(68.48세), 8명은 통제군(67.90세)으로 구분하여 트레이닝 프로그램의 효과를 검증하였다. 12주간의 밸런스트레이닝 전, 후의 대사증후군 지표와 기능적 체력을 살펴본 결과 다음과 같은 결과를 얻었다. 첫째, 12주간의 밸런스트레이닝 전, 후 대사증후군 지표에서는 유의한 상호작용을 나타냈다. 둘째, 기능적 체력에서 12주간의 밸런스트레이닝 전, 후에 유의한 상호작용을 나타냈다. 이는 밸런스트레이닝이 고령여성의 대사증후군 지표의 긍정적 변화와 함께 기능적 체력에 긍정적 영향을 미친다는 것을 확인할 수 있었다. 향후 트레이닝 기간과 측정변인의 확대를 통해 밸런스트레이닝의 효과를 보다 명확하게 할 필요가 있다.